Tea seed borer

The tea seed borer (Coccotrypes theae) is a destructive insect pest belonging to the family Curculionidae and the subfamily Scolytinae. This beetle is specifically adapted to inhabit and consume the reproductive structures of the tea plant, often causing significant losses in seed production.

The primary host plant for this species is Camellia sinensis. The beetles specifically target the seed pods (capsules) of the tea plant. By boring into these pods, the insects target the developing seeds, making them non-viable and directly impacting the propagation and genetic selection processes in tea nurseries.

The life cycle of the tea seed borer is confined within the seed pod. A female beetle bores through the capsule wall to lay eggs inside the seed tissues. Larval development occurs entirely within the seed, where the larvae feed on the endosperm. This protected environment allows the insect to thrive and complete its life stages safely from external predators.

The damage caused by Coccotrypes theae is categorized as severe for nurseries. The boring activity leads to the total destruction of the interior of the seed pod. Infested pods often show small entry holes and may exhibit premature abscission or decay, which reduces the potential seed yield and quality for the upcoming planting seasons.

Effective management strategies require a rigorous IPM approach. The most critical measures include:

• Strict sanitation by collecting and destroying all fallen pods to break the life cycle.
• Application of systemic insecticides during the peak adult flight period.
• Monitoring infestations with specific lures if available for the Scolytinae group.
• Ensuring that seed stock is quarantined and inspected before distribution to new fields.